I always refill my snake’s water dish with cold (so like 10°C) water, just so that she has the option to drink it cold if she wants to, or wait for it to get to room temperature.

Usually, she just goes up to the fresh water, tongue flicks on the surface, then ignores it for several hours. No idea if that means that she doesn’t like it cold. She could just be not thirsty at all but intrigued by the dish moving back into her space (I always change it while she’s looking, so that she knows what’s going on and isn’t startled by me moving it in or out).